Concrete-floor core



April 10, 1928. 1,665,542

W. S. HALDEMAN CONCRETE FLOOR GORE Filed Feb. l0, 1922 4 Sheets-Sheet l Swan M Wad/ 111mm April 10, 1928 1,665,542

W. S. HALDEMAN CONCRETE FLOOR CORE Filed Feb. 10, 1922' 4 Sheets-Sheet 2 W War/fer J. Haida/22a April 10, 1928. Y

' 1,665,542 W. S. HALDEMAN CONCRETE FLOOR CORE Filed. Feb. 10 1922 4 Sheets-Sheet 3 gin-0mm l l alfez J/fa/dezz'zazz gm! (Ima Patented Apr. 10, 1928 UN TE STATES PATENT, OFFICE.

WALTER s HALDEMA OF'CHICAGO, ILLINOIS, AssreNon, BY MEsNE ASSIGNMENTS, r0 THE BERGER MANUFACTURING COMPANY, or CANTON, OHIO, A CORPORATION OF OHIO.

CONCRETE-FLOOR CORE.

Application filed February 10, 1922. Serial No. 535,587.

The invention relates to the construction 7 of concrete floors to produce a monolithic formation of the girders, the joists, and the fioor slab, and the object of the improvement is to provide a. sheet-metal sectionalcore whichcan. be-variously assembled to change the relative proportions and dimensions of the joists and the slab, at any intermediate portion thereof, as may be desired.

Floor cores made otsheet metal, sometimes with transverse corrugations, have been formed of a series of transversely arched straight sections of uniform height and width, and tapered terminal sections with the smaller end closed have been used to increase the width of the joists and the depth of the slab at their junction with the girder; but such a formationof cores can only produce joists and a slab of uniform proportion and dimension intermediate the terminal core sections.- r

The present improvement involves the formation of a core with a plurality of 7 straight sections of'difierential dimensions as to height or width or both, and an intervening reducingpsection tapered endwise,

' with respect to height or width or both between adjacent straight sections; so that the relative proportions and dimensions of the joists and slab can be varied at any intermediate place between their junctions with the girders.

By variously assembling difl'erential straight sections and intervening tapered sections, the thickness of the joists and the depth of the slab can be made to place the concrete exactly where it is needed, not only at the'ends ofthe joists orslabs, but anywhere in the middleor intermediate portions thereof, wherever additional thickness or depth is required to take care of concentrated loads or to accommodate plun'ibing or other pipes or accessories.-

An embodiment of the invention is illustrated inthe accompanying drawings, forming part hereof, in which;

Figure 1 is an elevation section of a floor across a girder and through the slab between adjacent joist-s, showing core sections and their temporary supports in position; Fig. 2, a plan of a floor with the concrete broken away as in Fig. 3 to show the construction at difi'erent depths;

Fig. 3, a cross section of joists and slab,-

as on line IIIIII, Figs. 1 and 2;

Fig. 1, a perspective view'oi a straight core section; v

Fig. 5 a perspective: view of a terminal cap;

Fig. 6, a perspective view of a core section tapered in height and width,

Fig. 7, a plan of same;

Fig. 8, a side elevation of same;

Fig; 9, a larger end-elevation of same;-

Fig-.10, a perspective View of a core :sectiontapered in height only; V

Fig. 11, a perspective viewofa' core section tapered inwid th only. e

Similar numerals refer to similar parts throughout the drawings.

of straight sections 12, 12 and12" with-intervening tapered sections 13 and 13, all of which are preferably made of sheet metal with transverse corrugations. 7 F 1 As shown, the sides 14:, 14 and 14 of the straight cores, andthe-sides 15 and 15 of the tapered cores, are preferably inwardly inclined upward from the base flanges16 of the one and 16' of the other, so'as to flare the sides of the-joists and permit the cores to be readilyremoved; and thetops 17, 17 and 17 of the straight cores, and 18 and 18 of the tapered cores, are preferably crowned slightly in the 1niddle,-to increase their arching strength. 7 I

Each straight core is uniform in height and width through its length, but at opposite ends of tapered cores the straightcores are of differential heights or widths or both,- according to the height or widthof the cor-i responding end of the intervening tapered core; and it will be understood thata-se'ries of straight sections, exactly alike as 12 in Fig. 1, are joined together without any intervening-tapered section, in those parts of the floor wherein a. uniform width for the joists and depth for the slab is desired.

The reducing core-s may be endwise tapered on each side and also on the top, as shown in Figs. 1 to 3 and 6 to 9, or they may be tapered on the top only as shown in Fig, 10, or on the sides only, as shown in Fig. 11, depending upon the variation desired to be made in the width of a joist or the depth of the slab; and in either event, their ends'arc The improved core may include a series joined, as by overlapping one or more corrugations or parts thereof with the corresponding corrugations of the adjoining straight A closing cap 20 is preferably providedfor the end of theterminal section, to form the side of the beam between the ends of'the joists, and this cap can he applied to the end of a straight core section 12", as shown in Figs. 1 and 2 or may be applied to the end of a tapered section it it be desired to terminatethe end of the core with a reducing section.

gether, if desired; thus giving great; flexi-' The several core sectionsmay be made of any convenient length, and two or more tapered or reducing sections or two or more straight sections canbe joined directly tobility to the character and shape which can be given to the floor structure. 7

Obviously the slab can be graduallyarchec fromwa considerably greater i depth at its junction with the girder, to a materially less depth at or near the middle of the span betweengirders; and likewise, the joists can be gradually reduced from an. end widthapproximately the width of a beam, to a comparatively narrow-width, at or near the middle; and ineitherevent the reduced depth or width can be made by a series of steps or tapered sections which canbe combined orspaced to suit the exigencies of any particular situation. i i i I claim 1 r r 1.A core for concrete floor construction or the like, including a straight section having certain cross-sectional dimensions, an-

" other straight section havingdifierent crosssectional dimensions, and an intervening ta pered section joining the straight sections, the respective ends of the intervening section corresponding in cross-sectional dimensions to the ends oftheadjoining straight sections. 2. A coreforconcrete floor construction orthe like, including a straight sectionhaving width and height,'another straightsec tion l'iavingthe same width but adifierent height, and an intervening ta ered section joining the straight sections,t e respective ends of the intervening section corresponding in cross-sectional dimensions to the ends of the adjoining straight sections. a

3. A core for concrete floor construction or the like, including a straightsectionhaving width and height, another straight sec-- tion having the same height but a difl'erent widtl1,-and an intervening tapered section yolning the straight sections. the respective ends of the intervening section corresponding in cross-sectional dimensions to theends of the adjoiningstraight sections. x

4. A'core for concretefioor construction.

or the like, including a straight section having certain cross-sectional dimensions, anoth'er straight section having different crosssectional dimensions, and an 5 intervening tapered section joining the straight'sections, all the sections having base flanges extending to a uniform outsidewidth and the respective ends of the intervening section corresponding in cross-sectionto the ends of the adjoining straight sections.

5. A reducing core sectiorrfor concrete floors and the like, having both ends open and the sides tapered endwise, one of? the open ends having certain cross-sectional. di-- mensions 'tor connecting with 'a straight core section of the same cross-sectional dimensions, and the other open end having-different cross-sectional dimensions for connecting with another straight section having the same cross-sectional dimensions.

6. A reducing, core sectionfor concrete floors and. the like, having both ends open and the top tapered endwise, one of the open ends having certain cross-sectional dimensions for connecting witha straight core section of the same cross-sectional. dimensions,

and the other open end'having different cross-sectional dimensions for connecting with another straight section having the same cross-sectional dimensions. y

- 7 A, reducing core section for. concrete floors andthelike, having-both ends open and the sides and top tapered endwise, one of the open ends having certain cross-sectional dimensions for. connecting with a straightcore section of the same cross-sectional dimensions, and the other open end-- having diiterent crosssectionaldimensions for connecting with another straight section having the same cross-sectionaldimensions.

WALTERS. HALDEMAN. 

